ClickHouse/src/Common/ErrorCodes.h

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#pragma once
#include <stddef.h>
#include <cstdint>
#include <utility>
#include <mutex>
#include <common/types.h>
#include <string_view>
/** Allows to count number of simultaneously happening error codes.
* See also Exception.cpp for incrementing part.
*/
namespace DB
{
namespace ErrorCodes
{
/// ErrorCode identifier (index in array).
using ErrorCode = int;
using Value = size_t;
/// Get name of error_code by identifier.
/// Returns statically allocated string.
std::string_view getName(ErrorCode error_code);
struct Error
{
/// Number of times Exception with this ErrorCode had been throw.
Value count;
/// Time of the last error.
UInt64 error_time_ms = 0;
/// Message for the last error.
std::string message;
/// Stacktrace for the last error.
std::string stacktrace;
};
struct ErrorPair
{
Error local;
Error remote;
};
/// Thread-safe
struct ErrorPairHolder
{
public:
ErrorPair get();
void increment(bool remote, const std::string & message, const std::string & stacktrace);
private:
ErrorPair value;
std::mutex mutex;
};
/// ErrorCode identifier -> current value of error_code.
extern ErrorPairHolder values[];
/// Get index just after last error_code identifier.
ErrorCode end();
/// Add value for specified error_code.
void increment(ErrorCode error_code, bool remote, const std::string & message, const std::string & stacktrace);
}
}